SARMs RAD 140, also known as Testolone, is one of several selective androgen receptor modulators (SARMs) that was initially developed as a potential alternative to testosterone replacement therapy. It should not be confused with it’s esterified form, RAD 150, also known as TLB 150.
RAD 140 binds to the androgen receptors (AR) in a selective manner and does not produce the full range of androgenic effects as similar substances like testosterone, DHT, or anabolic steroids.

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